Speed reducer for troweling machine

Abstract

The utility model discloses a speed reducer for a troweling machine, which belongs to the field of speed reducers and comprises a speed reducer casing, an output shaft, an oil seal cover and an oil seal, the oil seal is inserted into the outer wall of the speed reducer casing, a coaxial oil seal is arranged inside the oil seal cover, the output shaft is arranged on the speed reducer casing and connected with a driving component, and the output shaft is connected with the driving component. The oil seal cover is arranged on the outer wall of the speed reducer shell and coaxially extends outwards through the oil seal, two symmetrical connecting plates are fixedly arranged on the edge of the outer wall of the oil seal cover, two symmetrical fastening rings are fixedly arranged on the outer wall of the speed reducer shell, and two separation conical blocks located in the two fastening rings are arranged on the outer wall of the speed reducer shell. When the oil seal cover on the speed reducer is disassembled and assembled, the oil seal cover does not need to be pried up and beaten by a tool, installation is more convenient and faster, meanwhile, contact between the tool and the oil seal cover is reduced, damage to the oil seal cover is reduced, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of speed reducer, concretely to a speed reducer for troweling machine. BACKGROUND

[0002] Speed reducer is one of the commonly used parts in mechanical industry, there are many kinds of speed reducer at present, the commonly used have cylindrical gear speed reducer, bevel gear speed reducer, worm gear speed reducer, planetary gear speed reducer and cycloidal pin gear speed reducer, and the worm gear speed reducer is commonly used in the concrete pavement troweling machine at present.

[0003] The output shaft part of the current troweling machine worm gear speed reducer is provided with an oil seal ring, an oil seal, and the oil seal is located in the oil seal ring. The existing ordinary oil seal ring is tightly inserted on the outer wall of the output shaft of the box body. When disassembling the oil seal, the edge of the oil seal ring needs to be slowly pried with a tool, and the oil seal ring is separated from the box body. Disassembling with a tool is not only inconvenient, but also may damage the oil seal ring when prying the edge of the oil seal ring, which affects the sealing effect of the oil seal ring. SUMMARY

[0004] The utility model aims at providing a kind of speed reducer for troweling machine to at least partly solve the above technical problems.

[0005] To achieve the above object, the utility model provides the following technical scheme: including speed reducer shell, output shaft, oil seal cover, oil seal, the oil seal is inserted and is arranged in the outer wall of speed reducer shell, the coaxial oil seal is arranged in the inside of the oil seal cover, the output shaft is arranged in speed reducer shell and is connected with driving assembly, and is extended outward with the coaxial oil seal, the outer wall edge of the oil seal cover is fixedly provided with two mutually symmetrical connecting plates, the outer wall of speed reducer shell is fixedly provided with two symmetrical fastening rings, the outer wall of speed reducer shell is provided with two disengagement conical blocks located in the inside of two fastening rings, the outer surface of two connecting plates is respectively fixedly provided with first elliptical block, the inner side of the outer edge of two fastening rings is respectively fixedly provided with second elliptical block, when the first elliptical block rotates counterclockwise from the right side of the fastening ring, first contact with the second elliptical block, second contact with the disengagement conical block;

[0006] The first elliptical block and the second elliptical block are contacted by bolt fixing, and the outer wall edge of the oil seal cover is fixedly provided with two extension handles.

[0007] Preferably, the centers of the first elliptical block, the second elliptical block and the disengagement conical block are on the same arc.

[0008] Preferably, the contact parts of the first elliptical block and the second elliptical block are respectively provided with contact platforms, and the oil seal cover is tightly contacted with the outer wall of the speed reducer shell when the first elliptical block and the second elliptical block are contacted.

[0009] Preferably, the fastening ring is an L-shaped hollow arc plate, a circular hole is formed in the outer wall of the fastening ring, and a threaded hole for threaded connection of the bolt is formed in the contact surface of the first and second elliptical blocks.

[0010] Preferably, the smaller diameter end of the disengaging conical block is in contact with the back surface of the connecting plate.

[0011] Preferably, a space gap is left between the connecting plate and the inner side of the fastening ring.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. When the utility model is used, the two connecting plates provided on the edge of the oil seal cover are inserted into the fastening ring, the oil seal cover is counterclockwise rotated, the first elliptical block provided on the connecting plate is in inclined contact with the second elliptical block provided on the inner side of the fastening ring, the installed oil seal cover is extruded tightly against the outer wall of the speed reducer shell, the installation of the oil seal cover is completed, and a hammer is not needed to knock the oil seal cover tightly against the speed reducer shell during installation.

[0014] 2. When the utility model is used, the oil seal cover is counterclockwise rotated during disassembly, the first elliptical block is disengaged from the abutting pressure of the second elliptical block, the edge of the connecting plate is in contact with the inclined surface of the counterclockwise distributed disengaging conical block, the connecting plate is gradually moved to the small diameter end of the disengaging conical block through the inclination of the slope, the connecting plate drives the oil seal cover to be tilted outward in the process, the contact edge of the oil seal cover and the speed reducer shell is exposed to a gap, a tool is not needed to pry open the gap, direct contact of the prying tool and the oil seal cover is avoided, damage caused during disassembly is reduced, and the practical service life of the oil seal cover of the speed reducer is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0016] Figure 1 It is the whole structure schematic diagram of this embodiment;

[0017] Figure 2 It is the whole front view plane structure schematic diagram of this embodiment;

[0018] Figure 3 It is the whole section structure schematic diagram of this embodiment;

[0019] Figure 4 It is the whole side view plane structure schematic diagram of this embodiment;

[0020] Figure 5 A amplification structure schematic diagram in the embodiment of the present application Figure 2 ;

[0021] Figure 6 B amplification structure schematic diagram in the embodiment of the present application Figure 4 .

[0022] In the drawings, the components represented by each reference numeral are listed as follows:

[0023] 1, speed reducer shell; 11, disengagement conical block; 2, output shaft; 3, oil seal cover; 31, connecting plate; 311, first elliptical block; 4, oil seal; 5, fastening ring; 51, second elliptical block; 6, bolt; 7, extension handle. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Please refer to Figures 1-6 , the utility model provides a kind of technical scheme: a speed reducer for smoothing machine, including speed reducer shell 1, output shaft 2, oil seal cover 3, oil seal 4, oil seal 4 is inserted and is connected and is arranged in the outer wall of speed reducer shell 1, coaxial oil seal 4 is arranged in the inside of oil seal cover 3, output shaft 2 is arranged in the connection of speed reducer shell 1 and drive assembly, and it is extended outward by oil seal 4 with coaxial, two mutually symmetrical connecting plates 31 are fixedly arranged in the outer wall edge of oil seal cover 3, two symmetrical fastening rings 5 are fixedly arranged in the outer wall of speed reducer shell 1, two disengagement conical blocks 11 located in the inside of two fastening rings 5 are arranged in the outer wall of speed reducer shell 1, first elliptical block 311 is fixedly arranged in the outer surface of two connecting plates 31 respectively, second elliptical block 51 is fixedly arranged in the inner side of the outer edge of two fastening rings 5 respectively, when first elliptical block 311 rotates counterclockwise from the right side of fastening ring 5, first contact with second elliptical block 51, and then contact with disengagement conical block 11;

[0026] first elliptical block 311 and second elliptical block 51 are fixed by bolt 6 when contact, two extension handles 7 are fixedly arranged in the outer wall edge of cover;

[0027] The two connecting plates 31 arranged at the edge of the oil seal cover 3 are inserted into the fastening ring 5, and the first elliptical blocks 311 arranged on the connecting plates 31 are in inclined contact with the second elliptical blocks 51 arranged on the inner side of the fastening ring 5. After installation, the oil seal cover 3 is extruded tightly against the outer wall of the speed reducer shell 1, and the installation of the oil seal cover 3 is completed. When the oil seal cover 3 is disassembled, the oil seal cover 3 is rotated counterclockwise. When the first elliptical block 311 is separated from the pressing of the second elliptical block 51, the edge of the connecting plate 31 is in contact with the inclined surface of the counterclockwise distributed separation conical block 11. Through the inclination of the slope, the connecting plate 31 gradually moves to the small diameter end of the separation conical block 11. In the process, the connecting plate 31 drives the oil seal cover 3 to be raised outward. (The height of the separation conical block 11 is less than the space gap left between the first elliptical block 311 and the inner side of the fastening ring 5.) The contact edge of the oil seal cover 3 and the speed reducer shell 1 exposes a gap, without the need for tools to pry the gap, the oil seal cover 3 is convenient to disassemble, and direct contact between the prying tool and the oil seal cover 3 is avoided, damage caused by disassembly is reduced, and the practical life of the oil seal cover 3 of the speed reducer is improved.

[0028] Further preferably, the centers of the first elliptical blocks 311, the second elliptical blocks 51, and the separation conical blocks 11 are respectively on the same circular arc.

[0029] The centers of the first elliptical blocks 311, the second elliptical blocks 51, and the separation conical blocks 11 are respectively on the same circular arc. When the oil seal cover 3 is rotated, the first elliptical blocks 311 can be in contact with the second elliptical blocks 51 and the separation conical blocks 11, respectively, facilitating the dismounting and installation of the oil seal cover 3.

[0030] Further preferably, the contact parts of the first elliptical blocks 311 and the second elliptical blocks 51 are respectively provided with contact platforms. When the first elliptical blocks 311 and the second elliptical blocks 51 are in contact, the oil seal cover 3 is in close contact with the outer wall of the speed reducer shell 1.

[0031] The contact parts of the first elliptical blocks 311 and the second elliptical blocks 51 are respectively provided with contact platforms. After the first elliptical blocks 311 and the second elliptical blocks 51 are extruded, the first elliptical blocks 311 are constrained on the second elliptical blocks 51, and the oil seal cover 3 after extrusion is constrained and fixed.

[0032] Further preferably, the fastening ring 5 is an L-shaped hollow arc plate, the outer wall of the fastening ring 5 is provided with a circular hole, and the contact surfaces of the first elliptical blocks 311 and the second elliptical blocks 51 are respectively provided with threaded holes for threaded connection of bolts 6.

[0033] The L-shaped hollow arc plate fastening ring 5 forms a channel with two open ends between the fastening ring 5 and the speed reducer shell 1, which is used for moving the connecting plate 31 to the inside of the fastening ring 5, and the first elliptical block 311 and the threaded hole on the second elliptical block 51 are used for further fixing the first elliptical block 311 and the second elliptical block 51 after installation by the bolt 6, preventing the oil seal cover 3 from moving during the operation of the speed reducer and damaging the sealing effect.

[0034] Further preferably, the smaller diameter end of the disengagement conical block 11 is in contact with the back surface of the connecting plate 31.

[0035] The connecting plate 31 is set to rotate counterclockwise away from the first elliptical block 311, and the edge of the connecting plate 31 first contacts the large diameter end of the disengagement conical block 11, and continues to rotate so that the first elliptical block 311 moves from the inclined slope of the disengagement conical block 11 to the small diameter end of the disengagement conical block 11, and when it moves to the small diameter end of the disengagement conical block 11, the back surface of the connecting plate 31 is in contact with it, and continues to rotate so that one end of the connecting plate 31 is disengaged from the inside of the fastening ring 5.

[0036] Further preferably, there is a space gap between the connecting plate 31 and the inside of the fastening ring 5.

[0037] Through the space gap between the connecting plate 31 and the inside of the fastening ring 5, the first elliptical block 311 and the disengagement conical block 11 are in contact and lifted away from the fastening ring 5.

[0038] One specific application of the embodiment is: when installing the oil seal cover 3, first, the oil seal 4 inside the oil seal cover 3 is sleeved on the output shaft 2 and moved to the speed reducer shell 1 part, the connecting plate 31 provided on the edge of the oil seal cover 3 is aligned with the opening on the right side of the fastening ring 5 provided on the outer surface of the speed reducer shell 1, and the oil seal cover 3 is rotated counterclockwise, so that the two connecting plates 31 are respectively rotated to the inside of the two fastening rings 5, and when the first elliptical block 311 provided on the connecting plate 31 is in contact with the edge of the second elliptical block 51 provided on the inside of the fastening ring 5, the first elliptical block 311 is rotated by using the extension handle 7, and when the first elliptical block 311 is pressed by the slope of the second elliptical block 51, the first elliptical block 311 drives the connecting plate 31 and the oil seal cover 3 to rotate and press the outer surface of the speed reducer shell 1 for sealing, and when the first elliptical block 311 moves to the stepped surface of the second elliptical block 51, the sealing part inside the oil seal cover 3 is in close contact with the outer wall of the speed reducer shell 1, and the sealing installation of the oil seal cover 3 is completed.

[0039] In the description of the utility model, need understanding is, the term "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and is not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore can not be understood as a limitation on the utility model.

[0040] In the utility model, unless another explicit provision and limitation, the term "installation", "arrangement", "connection", "fix", "screw joint" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element internal communication or two element mutual action relationship, unless another explicit limitation, for the ordinary skill in the art, can understand the specific meaning of the above-mentioned term in the utility model according to specific circumstances.

[0041] Although the embodiments of the utility model have been shown and described, for the ordinary skill in the art, can understand that the embodiments can be changed, modified, replaced and changed in many ways without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. A reducer for trowel, comprising a reducer shell (1), an output shaft (2), an oil seal cover (3), an oil seal (4), the oil seal (4) is inserted and arranged on the outer wall of the reducer shell (1), the coaxial oil seal (4) is arranged inside the oil seal cover (3), the output shaft (2) is connected with the driving assembly in the reducer shell (1) and extends outwardly through the coaxial oil seal (4), characterized in that: The outer wall edge of the oil seal cover (3) is fixedly provided with two mutually symmetrical connecting plates (31), the outer wall of the speed reducer shell (1) is fixedly provided with two symmetrical fastening rings (5), the outer wall of the speed reducer shell (1) is provided with two disengagement conical blocks (11) located inside the two fastening rings (5), the outer surfaces of the two connecting plates (31) are respectively fixedly provided with first elliptical blocks (311), the inner sides of the outer edges of the two fastening rings (5) are respectively fixedly provided with second elliptical blocks (51), when the first elliptical blocks (311) rotate counterclockwise from the right side of the fastening ring (5), the first elliptical blocks (311) first contact the second elliptical blocks (51) and then contact the disengagement conical blocks (11). ​ The first elliptical blocks (311) and the second elliptical blocks (51) are fixed by bolts (6) when they are in contact, and the outer wall edge of the oil seal cover is fixedly provided with two extension handles (7).

2. A speed reducer for a trowel machine according to claim 1, characterized in that: The centers of the first elliptical blocks (311), the second elliptical blocks (51) and the disengagement conical blocks (11) are respectively on the same circular arc.

3. A speed reducer for a trowel machine as defined in claim 1, wherein: The contact parts of the first elliptical blocks (311) and the second elliptical blocks (51) are respectively provided with contact platforms, and the oil seal cover (3) is in close contact with the outer wall of the speed reducer shell (1) when the first elliptical blocks (311) and the second elliptical blocks (51) are in contact.

4. A speed reducer for a trowel machine as defined in claim 1, wherein: The fastening ring (5) is an L-shaped hollow arc plate, the outer wall of the fastening ring (5) is provided with a circular hole, and the contact surfaces of the first elliptical blocks (311) and the second elliptical blocks (51) are respectively provided with threaded holes for threaded connection of the bolts (6).

5. A speed reducer for a trowel machine as defined in claim 4, wherein: The smaller diameter end of the disengagement conical block (11) is in contact with the back surface of the connecting plate (31).

6. A speed reducer for a trowel machine as defined in claim 1, wherein: The connecting plate (31) and the inner side of the fastening ring (5) have a space gap.

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